1 files changed, 71 insertions, 0 deletions
diff --git a/spec/rubocop/cop/background_migration/feature_category_spec.rb b/spec/rubocop/cop/background_migration/feature_category_spec.rb
new file mode 100644
index 00000000000..359520b1d9f
--- /dev/null
+++ b/spec/rubocop/cop/background_migration/feature_category_spec.rb
@@ -0,0 +1,71 @@
+# frozen_string_literal: true
+
+require 'rubocop_spec_helper'
+require_relative '../../../../rubocop/cop/background_migration/feature_category'
+
+RSpec.describe RuboCop::Cop::BackgroundMigration::FeatureCategory, feature_category: :database do
+  let(:cop) { described_class.new }
+
+  context 'for non background migrations' do
+    before do
+      allow(cop).to receive(:in_background_migration?).and_return(false)
+    end
+
+    it 'does not throw any offense' do
+      expect_no_offenses(<<~RUBY)
+        module Gitlab
+          module BackgroundMigration
+            class MyJob < Gitlab::BackgroundMigration::BatchedMigrationJob
+              def perform; end
+            end
+          end
+        end
+      RUBY
+    end
+  end
+
+  context 'for background migrations' do
+    before do
+      allow(cop).to receive(:in_background_migration?).and_return(true)
+    end
+
+    it 'throws offense on not defining the feature_category' do
+      expect_offense(<<~RUBY)
+        module Gitlab
+          module BackgroundMigration
+            class MyJob1 < Gitlab::BackgroundMigration::BatchedMigrationJob
+            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ #{described_class::MSG}
+            end
+          end
+        end
+      RUBY
+    end
+
+    it 'throws offense on not defining a valid feature_category' do
+      expect_offense(<<~RUBY)
+        module Gitlab
+          module BackgroundMigration
+            class MyJob1 < Gitlab::BackgroundMigration::BatchedMigrationJob
+            feature_category :invalid_random
+            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ #{described_class::INVALID_FEATURE_CATEGORY_MSG}
+            end
+          end
+        end
+      RUBY
+    end
+
+    it 'will not throw offense on defining a valid feature_category' do
+      expect_no_offenses(<<~RUBY)
+        module Gitlab
+          module BackgroundMigration
+            class MyJob < Gitlab::BackgroundMigration::BatchedMigrationJob
+              feature_category :database
+
+              def perform; end
+            end
+          end
+        end
+      RUBY
+    end
+  end
+end